XD innovation is very evident in the 250ml Lock Travel Mug which has been designed for commuters and people on the move. It features a handy spring loaded flip top lid which can easily be opened and closed with one hand and is fitted with rubber seals to eliminate the possibility of leaks. The tumbler is BPA free with a stainless steel outer wall combined with a tough polypropylene inner wall and hand washing is recommended. Lock offers an environmentally inspired design feature which allows it to be easily taken apart for recycling and there is an instructional recycling diagram on the beautifully printed XD Design gift box. Hand washing is recommended and it laser engraves to a natural etch.